CVE-2010-0349 in WebCalenderC3
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in C3 Corp. WebCalenderC3 0.32 and earlier allows remote attackers to inject arbitrary web script or HTML via unknown vectors. NOTE: this issue could not be reproduced by the vendor, but a patch was provided anyway. The original researcher is reliable.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 04/11/2025
The vulnerability identified as CVE-2010-0349 represents a cross-site scripting flaw in C3 Corp. WebCalenderC3 version 0.32 and earlier, constituting a critical security weakness that enables remote attackers to execute malicious web scripts or HTML code within the context of affected systems. This type of vulnerability falls under the broader category of injection attacks and specifically aligns with CWE-79, which defines cross-site scripting as a weakness that allows attackers to inject client-side scripts into web applications. The vulnerability's classification as a persistent security flaw indicates that it can be exploited by remote unauthenticated attackers without requiring any special privileges or access to the system's internal workings.
The technical nature of this XSS vulnerability stems from insufficient input validation and output encoding mechanisms within the WebCalenderC3 application. Attackers can leverage unknown vectors to inject malicious scripts that will execute in the browsers of other users who access the vulnerable calendar application. These vectors likely involve improper sanitization of user-supplied data that is subsequently rendered on web pages without adequate security measures. The vulnerability's impact extends beyond simple script execution as it can potentially enable session hijacking, data theft, and further exploitation through more sophisticated attack chains. The fact that the vendor could not reproduce the issue does not diminish its validity, as the presence of a provided patch indicates that the security community recognized the potential risk despite the inability to consistently demonstrate the exploit.
The operational impact of CVE-2010-0349 is significant for organizations utilizing the affected WebCalenderC3 software, as it creates a persistent threat vector that can compromise user sessions and potentially lead to full system compromise. Attackers could exploit this vulnerability to steal user credentials, manipulate calendar data, or redirect users to malicious websites. The vulnerability's remote nature means that attackers do not need physical access to the system or any local network presence to exploit it, making it particularly dangerous in environments where the calendar application is publicly accessible. This type of vulnerability directly impacts the confidentiality, integrity, and availability of the calendar system, potentially affecting business continuity and user trust in the application.
Organizations should immediately implement the vendor-provided patch to remediate this vulnerability, as the presence of a patch indicates that the security issue has been properly identified and addressed. Additional mitigations should include implementing proper input validation and output encoding mechanisms, deploying web application firewalls, and conducting regular security assessments of calendar and web applications. The vulnerability's classification under ATT&CK technique T1566.001 for credential access through social engineering highlights the potential for attackers to leverage this vulnerability as part of broader attack campaigns. Security teams should also consider implementing content security policies and monitoring for suspicious script execution patterns. The incident underscores the importance of maintaining up-to-date software and conducting thorough security testing to identify and remediate vulnerabilities before they can be exploited by malicious actors.